Method of and apparatus for verifying perforated records



May 18, 1943 w. LEATHERS a-rm. 2,319,414

METHOD OF AND APPARATUS FOR VERIFYING PERFORATED RECORDS Filed June 2'7, 1942 3 Sheets-Sheet l INVENTORS Wa rd L eaz'hers, efzrrzerliaddard, William elf/7. Bailey. BY I ORNEY May 18, 1943 w. LEATHERS ETAL METHOD GRAND APPARATUS FOR VERIFYING PERFORATED RECORDS Filed Jun 27, 1942 3 Sheets-Sheet 2 INVENTORS F Wu rd 1- 6:13? era, Jerrier/faddad, William Jflfiaile ATTORNEY.

l/: 1943 W. LEATHIERS ETAL ,3 9,414

METHOD OF AND APPARATUS FOR VERIFYING PERFORATED RECORDS File d June 27, 1942 {Sheets-Sheet :s

INVENTORS; WardI-eatkera, I .Terrl'ez'lfaddkg'd;

William JI/lBa iZey Patented May 18, 1943 METHOD OF AND APPARATUS FOR VERIFY- ING PERFORA' IED RECORDS Ward Leathers and Jerrier Haddad, Brooklyn, N. Y., and William J. A. Bailey, Packanack Lake, N. J assignors to International Business Machines Corporation, New York, N. Y., a corporation of New York Application June 27, 1942, Serial No. 448,824

3 Claims. (Cl.'17910li.1)

The present invention relates to a method of and apparatus for verifying perforated records, and more particularly refers to a method and apparatus for verifying such records by means of a'series of audible signals which are caused to be rendered in timed relation to the movement of the perforated record or records through the apparatus.

The improved apparatus and method comprising the present invention is primarily adapted for use in connection with verification of numerical data which has been punched or otherwise perforated in a continuous elongated strip of paper or tape, but the apparatus may, with but slight modification, be employed for verifying numerical data which has been recorded by a punching operation on a record card or series thereof. Similarly, while the invention has been illustrated and described herein as being specifically applicable to the verification ohnumerical data, the invention is also susceptible to such modification as will render the same suitable for the audible verification of alphabetical or other recorded data.

The original numerical data punched on a record tape is, according to the present invention, applied to the tape in the form of perforations arranged in longitudinal parallel columns having transverse lines of differential index point positions or columns upon which perforations are positioned in such a manner as to represent different numbers in the Arabic system, according to a selected code. In the present instance, the "Telelector code system is used. In this code system the numerals to 9 are each represented by one or more perforations in thecorresponding index point position of the tape in a manner similar to that set forth in U. S. patent to Ward Leathers, dated Mar. 3, 1943, #2,314,318, which at present is in the form of application Serial No.

' have associated therewith a coding mechanism for automatically translating the original numerical data into the form of code onto the tape,

thus relieving the operator of the responsibility of mentally performing code operations. In

either event, the net result will be the same, i. e.,

the translation of the data to the tape in the form of perforations which fall upon the various index point positions, and, appearing there, represent the corresponding numerals according to the selected code.

When using such tape punching machines the operator will, upon occasions, depress the wrong key and an incorrect numerical item is then tabulated upon the tape. For this reason it is usually necessary to check or verify the punched tape to determine if any errors in punching have been made. Sometimes this verification is done by a visual inspection thereof but this method of checking has proven unsatisfactory for numerous reasons; one being that it is a time-consuming operation, and another being that the person doing the verification is subject to the same conditions which caused the original error and is likely to make a repetition thereof.

Verification of both alphabetical and numerical data, particularly where individual cards are concerned, has also been accomplished by the use of verification apparatus in which the punched cards are placed in the apparatus and the operator, preferably taking the data from the original sheet, operates keys similar to the original keys of the punching machine in the same manner as the punching of the original record card. If the original record card has been correctly punched, the carriage of the verification apparatus feeds forwardly without interruption but if a punched hole is incorrectly placed on the card or has been omitted altogether, the carriage fails to feedforwardly thereby appraising the operator of the error; While such apparatus represents a marked improvement over the visual method of verification insofar as speed of verification is concerned, it is still subject to the limitation that duplication of errors in punching will occasionally arise.

The present invention is designed to overcome the above notedlimitations that are attendant upon the use of manually operated verification apparatus and toward this end contemplates the provision of an apparatus in which data-containing material (which in the present instance is a'strip of tape that has been punched with coded numerical data) may be placed and'the material advanced through the machine while simultaneously an audible signal is caused to be rendered that isindicative of the various coded numerical representations appearing at the corresponding successive transverse index point positions or columns. By thus bringing into play and correlating the sensory powers ,of auditory and visual perception, the verifying operator performs a series of mental operations which is entirely different from the mental operations performed by the original punch machine operator,

who is obliged to bring into play and correlate certain visual and physical perceptions wherein the original record is viewed, the code (if a. code is employed) calculated mentally, and the coded numerical characters translated by manual oper-.- ations for verification purposes. In this manner, since the punching operator and the verifying operator utilize diflerent physical and mental perceptions in the course of their respective duties, the. chance that each will encounter the same error under the same physical and mental conditions is non-existent and the chance of both repeating the same error is thus very slight.

This being the principal object of the invention, it is another object thereof to provide a verifying apparatus of thecharacter set-forth above which, although the original data material may be translated on a tape according to the Telelector or other code system, will, in the course of rendering its audible verification of the coded material, automatically decode the same and present its verification thereof in terms of the original numerical data.

A stillfurther object of the invention is to provide an apparatus of this sort having suitable tape sensing mechanism and wherein the audible verifying signals transmitted to the operator in synchronism with the movement of the tape through the sensing mechanism are in the form of high fidelity recordings of the human voice which are caused to successively enumerate the various Arabic numerals corresponding to the selected code characters encountered by the sensing mechanism.

Yet another object of the invention is to provide an apparatus which is fully automatic in its operation and which will receive the tape for verification purposes and, after it has been set into operation, will proceed to render audible verification of the coded numerals punched thereon continuously until stopped by the operator of the apparatus. A similar and related object is to provide a fully automatic apparatus of this character capable of performing definite operations contributive toward a unitary result in a sequential manner and'in which each operation is performed and completed before the next succeeding operation is permitted to take place,

thus eliminating the necessity for providing a timing control mechanism.

Provision of an apparatus which is relatively simple in its operation and which. is comprised of a minimum number of moving parts and which, therefore, is unlikely to get out of order;

one which may be manufactured at a relatively small cost; one in which the-speed thereof may be varied at will to accommodate the skill and experience of various operators; one which may be operated with a minimum of effort on the part of the operator and which, therefore, does not In the accompanying three sheets of drawings one embodiment of the invention has been shown. In these drawings:

Fig. 1 is a diagrammatic view illustrating the manner in which a permutation system employed in connection with the present invention is correlated with the Telelector code system in the verification of perforated tape.

Fig. 2 is a side elevational view partly in section of one form of apparatus constructed in accordance with the principles of the present invention.

Fig; 3 is a fragmentary front elevational view of the apparatus shown in Fig. 2.

Fig. 4 is a sectional view taken substantially along the lin 4-4 of Fig. 2'. i

Fig. 5 is a sectional view taken substantially along the line 5-5 of Fig. 4.

Fig. 6 is a top plan view of the arrangement of parts shown in Fig. 5.

Fig. 7 is a fragmentary sectional view similar to Fig. 5 showing a guiding bracket in detached relationship from the remainder of the apparatus shown in Fig. 5.

Fig. 8 is a perspective view of a combined Brief description Referring now to Fig. 10, briefly the apparatus includesa sensing unit which may be more or less conventional in design and which employs the usual sensing brushes and common contact bar for selectively closing various circuits through the perforations provided in the tape or other record bearing medium which is to be verified.

The tape which has been punched according to a selected code system, which may be the Telelector system, is adapted to be moved through the sensing unit in step-by-step fashion to bring the brushes of the sensing unit into register with the successive index point positions for circuit closing purposes.

The sensing unit is electrically connected to and serves as a control device for operating a permutation bar assembly by means of which light issuing from a. source is selectively directed into register with one of a series of sound tracks provided on a continuous strip of sound film. Each sound track is representative of a numeral in the Arabic system or of a special character on the tape or of the absence of a character. The light, after passing through the selected sound track, entersthe aperture of a light sensitive cell which is connected to an amplifier hav- .ing a loud speaker associated therewith. The

manner of electrical connection between the brushes of the sensing unit and the permutation bar assembly is such that. as the various code characters come into register withsthe brushes, the permutation'bars are moved in such a manner that various apertures provided in the same mation punched on the tape and of selection of the proper sound track for relaying the decoded information to the amplifier or sound unit.

Associated with the sensing device, the decoding-permutation assembly and the amplifying device is an electrical control system for automatically maintaining a certain sequence of operations whereby an impulse is initially fed to the sensing unit, circuits are closed by the latter for operating the permutation bars and locking the same, a predetermined distance or amount of travel is imparted to the sound film in order that an audible signal may be rendered by the sound unit, motion of the sound film is terminated at the end of the travel, the tape is advanced from one index point position to the next, and the permutation bars are released prior to the next operation commencing the next succeeding cycle. The operation of the apparatus is continuous until such time as the operator. opens a switch and shuts off the source of power.

The sensing unit Still referring to Fig. 10, the tape T may be fed from a reel (not shown) beneath a series of sensing brushes l2 forming a part of the sensing unit I I and between these brushes and a common contact bar l4. Step-by-s'tep movement of the tape is efl'ected by means of a sprocket wheel l8 mounted on a shaft l8 and adapted to be driven by means of a ratchet mechanism 20 which in turn is operated by a magnet 22. The

ratchet mechanism 28 is indirectly operated, that is to say, each time the magnet 22 is energized the ratchet mechanism becomes preset and, upon deenergization of the magnet, a coil spring 24 imparts an operative stroke to the mechanism to advance the tape one step. Associated with the magnet 22 and its armature 28 are two pairs of normally closed contacts 28 and 38. The contacts 28 are shorting contacts and are included in a local circuit whose wires are designated at a and b including a resistance R1 connected in series with the circuit of the magnet 22 in such a manner that upon the opening of the normally closed contacts 28 the resistance is thrown in series with the magnet to prevent excessive current consumption thereby. The circuit of the magnet 22 extends from a source of current supply S through lines c, d, a, the contacts 28, line b, the magnet 22, line e, a pair of contacts 29, lines I, i, g and h to the source S. The contacts 38 are included in a localcircuit leadingfrom the source S through the line 0, starting switch S1. line i, the contacts 38, line It, a clutch magnet 32, and lines I and h to the source, the purpose of which circuit will be set forth hereinafter.

The tape T is shown as being provided with a series of perforations 34 which are arranged on the various index point positions according to the Telelector code, examples of'which are shown in the copending application, Serial No. 300,157,

above referred to, and also shown in slightly modified form in Fig. 1. This code system utilizes four longitudinally extending lines, and as a consequence a corresponding number of sensing brushes i2 is employed. The various sensing brushes l2 are connected by means of lines m, n, o and p to a permutation bar assembly 36 to effect electrical control of the latter in a manner that will likewise be set forth presently. The common contact bar l4 of the sensing unit is connected to a common lead line 1 which is in turn connected to the source through a pair of contacts 38 and lines-s, t, u and v.

The sensing unit per se thus far described is more or less conventional in its design. No claim is made herein to any novelty associated with the same, the novelty of this application residing rather in its functional association with the various other instrumentalities and devices which will now be more fully set forth.

The permutation bar assembly Still referring to Fig. 10, the permutation bar assembly includes a series of magnets 48, 42, 44 and 48 connected respectively to the various lines m, n, o and 12 leading from the sensing unit II. A common wire to for the various magnets 48, 42, 44 and 46 is connected to the line 1 and from thence through the lines 9 and h to the source S.

Each of the magnets 48, 42, 44 and 46 is provided with an armature 48 adapted upon being attracted to close a pair of normally open looking contacts 58, which pairs of contacts have a common line a: leading to a pair of contacts 54 connected by a line 111 to the line t and from thence through the lines it and 'v to the source S.

Referring now specifically to Figs. 1, 2, 4 and 10, each of the armatures 48 is pivotally connected to a permutation bar, the various permutation bars being designated at 56, 58, 80 and'62 and being arranged in close contiguous parallel relationship. Each of the permutation bars is provided with a series of apertures 84 extending therethrough and the bars are independently shiftable longitudinally in such a manner that certain selected apertures are adapted to be brought into registry for the purpose of transmitting light issuing from a light source assembly 55' therethrough. The permutation bars 56, 58,

68 and-82 are positioned in close proximity to a light sensitive cell 68 forming part of an amplifying sound unit 61 and which is substantially coextensive with the span of the various permutation bars, in order that light passing through any series of aligned apertures that may exist therein will energize the cell. A sound film 18 carried by a film projection apparatus II has a straightaway portion 12 which is interposed between the light sensitive cell 66 and the permutation bars in order that light issuing from the latter will pass through the film before entering the cell.

The specific construction of the permutation bar assembly is best illustrated in Figs. 2 to 8, inclusive, and reference may now be had to these figures for a full disclosure thereof. The permutation bar assembly is intimately associated with the light source assembly 55 and the film proiection apparatus H and all three of these assembl es are mounted on a common supporting base 80. The light source assembly 55 is supported upon a bracket 82 mounted on the base 80 and includes a casing 84 which forms a support for the permutation bar assembly 36. The ma nets 40 and 42 are mounted upon and carried by a bracket'BB and the magnets 44 and 46 are similarly mounted upon and carried by a bracket 88, the brackets 86 and 88 (see Fig. 8) each being provided with ears 80 which are bolted or otherwise secured to the opposite sides of a U-shaped bracket 9| having a central opening 93 in the form of a slot formed in the front face portion thereof. A transverse groove 94 communicates with the opening 93 and serves as a guideway for the various permutation bars 55, 58, 68 and 82. Each of the brackets 88 or 88, as the case may be, is formed with an upstanding flange or guide 82 having a guideway 96 formed therein in registry with the guid'eway 94 and in which the various permutation bars 66, 68, 60 and 62 are slidable. The permutatipn bars 58 and 60 have their inner ends disposed in the vicinity of the bracket 88', whereas the permutation bars 66 and 62 have their inner ends disposed in the vicinity of the bracket 86, the inner ends of each of the permutation bars being attached by means of coil springs 36 to upstanding lugs 98 provided 7 on the respective brackets 86 and 88. A plurality of upstanding pins I provided on the brackets 06 and 88 serve to limit the extent of piv-' 'otal movement of the armatures 48 and thus it will be seen that the permutation bars 68 and V 60' are biased in their movement in one direction, whereas the permutation bars 66 and 62 are biased in their movement in the opposite direction. A face plate I02 is seated within a recess I04 formed in the face portion of the bracket II and is provided with a slot I06 having tapered walls for the admission of light from the light source assembly to the permutation bars. A follower I08 mounted on a carriage IIO,.w hich is spring pressed as at II2, bears against. the film I0 and serves to hold the same firmly against the face portion of the bracket 9|. The follower I00 is formed with a narrow slot I I4 therein in registry with the slot I06. Thus it will be seen that light issuing from the source 66 may pass through the slot I06 and through any of the series of apertures 64 in the permutation bars which happen to be in alignment and from thence through the slot H4 and film I0 to the light sensitive-cell 66.

The sound film The sound film I0 is in the form of a continuous strip of transparent material as shown in Fig. 9, and is provided with the usual series of marginal apertures I4 for driving purposes. A plurality of sound tracks I6 are provided in the sound fihn I0 and are arranged in plural groups, the various tracks of each group being substantially identical as far as their recorded sound is concerned and the tracks of each group extending in parallelism throughout a limited circumferential area of the film. While in the present instance three grouped series of sound tracks have been shown, it is obvious that a greater or lesser number of such groups may be employed,

if desired. 'Each'group' of sound tracks consists of a series of markings or lines which is representative of an Arabic numeral or special character as spoken by the human ,voice. The corresponding tracks, i. e., those tracks in which the human voice speaks the same Arabic numeral, are arranged in end-to-end alignment about the circumference of the endless film. The representations of the various Arabic numerals are preferably arranged in sequential order commencing with the sound track for the numeral 0 at one edgewof the film and proceeding to the sound track for the, numeral 9 medially of the film with several columns being reserved for special characters, such as characters which represent an absence of a coded character on the tape, a rate character, a monetary value character, a Sub-total; a total, a hyphen or arithmetical value, etc., and proceeding to the other edge of the film. The various groups of sound tracks are separated from each other by a relatively narrow space designated at I8, the function of which will beset forth subsequently.

The light source assembly- Any suitable optical system which will project a narrow beam or ribbon of light of suflicien't extent to bridge the transverse distance across the sound track region of the film I0 is suitable for use in connection with the present invention and no novelty is claimed for the specific assembly shown in Fig. 2. While it is possible to employ a light source in the form of an electric resistance bulb having an elongated glass web formed on one side thereof which will transmit light outwardly from the bulb in the form of a thin ribbon, it is preferable to employ a conventional light bulb such as is shown at I together with 7 a lens system including a pair of cylindrical convex'lenses I22 and I24, the latter being an ob- Jective lens inasmuch as such a lens system will not' only direct a thin ribbon of light upon the slot I06 but at the same time it will intensify such a beam to the extent that any portion of the beam admitted through the selected aligned holes in the permutation bars 66, 66, 60 and 62 will be of suflicient intensity as to positively energlze the light sensitive cell 66. Irrespective, however, of the specific light source construction which may be employed for throwing a ribbon of light upon the slot I06, the essential features of the invention remain unaltered.

The film projection apparatus Referring now in detail to Figs. 2 and 3, the

- film projection apparatus involves in its general organization a pair of vertical standards I30 and I32 respectively, across which there extends a rotatable shaft I34 provided with a driving gear I38 thereon adjacent-the standard I30 on the inner side thereof. The gear I36 meshes with a gear I38 carried on a sleeve or driving spool I40 which is in turn rotatably mounted on a stationary shaft I42 which is anchored by means of a clamping bolt I44 to the standard I30. The spool I40 has disposed thereon a pair of driving sprockets I43, and thus it will be seen that rotation of the shaft I34 will impart a corresponding movement to the endless film I0 carried on the spool I40. The standard I30 (see Fig. 2) extends upwardly beyond the upper end of the standard I32 and serves to support at its upper end an idler roller I46 over which the endless strip of sound film passes. A follower device I46 is pivoted as at I60 to the standard I30 adjacent the upper end thereof and is provided with a pair of idler rollers I62 which by gravity bear against the film I0 and exert suflicient resistance to movement of the film to hold the straightaway portion I2 thereof taut. An additional spring-pressed follower I 6i is pivoted at I63 adJacent its lower end to the standard I 30 and carries at its free end a roller I66 which bears against the film and maintains the same in position against the spool The rotatable shaft I34 projects completely through the standard I32 and carries at its outer end one element or face plate I64 of a friction clutch assembly I66, the other element or face plate I68thereof being mounted on a shaft I60 which is adapted to be continuously driven by mittent drive of the shaft means-of a motorM through-a suitable gear reduction device I62. The nature of the friction clutch I 66 is such that motion is normally transmitted from the face plate I68 to the face plate I64 todrive the shaft I34 except during such time that this latter face plate is restricted in its motion. In order to effect the necessary inter- I34, and consequently of the film 10, the face plate I54 is provided with a plurality of outwardly projecting, radially extending fingers I64, of which there are preferably three in number, equally spaced about the periphery of the face plate. A retractable limit stop or pin I66 is slidably disposed in a guideway I68 formed in the standard I32 and this latter pin is normally urged to a position wherein its outer end is directly in the path of movement of the various fingers I64. Toward this end an arm I10 which is pivoted at I12 to a bracket I14 engages the inner end or head I16 of the stop pin I66 and operates to move this latter pin from its advanced to its retarded position, and vice versa. A coil spring I18 normally urges the arm I10 in such a direction that the stop pin I66 is in its advanced position for limiting the movement of the face plate I54.

The clutch magnet 32, previously mentioned, is mounted upon the bracket 4 and is provided with an armature I80 which is secured to the arm I10 in such a manner that upon energization of the magnet 32 the arm I10 is moved to its retracted position and the pin I66 is withdrawn from the path of movement of the fingers I64 on the face plate I54. Upon deenergization of the clutch magnet 32 the arm is released and the spring I18 serves to move the latter to its advanced position.

The sound unit The photoelectric cell 86 is connected to the input circuit of the amplifier 61 and the output circuit of the amplifier may alternatively be connected to a loud speaker I80 or ,to a pair of earphones I82, suitable switches S3 and S4 being provided in the respective output circuits for the purpose of cutting one or the other of the sounding devices out of operation. It is obvious that any suitable type of amplifier may be employed.

The electrical circuit connections Referring again to Fig. 10, the electrical circuit connections for the apparatus have in part been previously described and it is deemed unnecessary to make repetition of such description herein. It is to be noted, however, that the contacts 38 are normally closed while the associated contacts 29' and 54 are normally open. Opening and closing movements of these three pairs of contacts are controlled by means of a control relay magnet I90, the armature I9I of which serves upon energization of the relay I90 to simultaneously close the contacts 29- and 54 and make delayed opening of the contacts 38. The control relay magnet I90 is provided with a local circuit extending from a battery I92 and including line a, a pair of contacts I93, line b, the

' magnet I90 and line 0'.

The face plate I54 of the friction clutch I56 carries a shaft I51 on which there is mounted a cam disc I59 having a series of five cam projections I6I formed thereon designed upon rotation 01' the disc I59 in the direction indicated by the arrow, for successive contact with a follower I63 by .means of which the normally closed contacts I93 are opened.

The amplifier unit 81 is connected to the source of power S by means of connecting lines d and e which are connected to the lines 12 and g respectively. Similarly, the light source element I20 is connected by means of lines f and g to the lines w and u respectively. A switch S2 adjacent tlie source S serves to disconnect the source from the motor M, the amplifier 61 and the light source I 20 in one operation.

In order to control the speed of operation of the apparatus a plurality of, condensers having varying capacities and designated at 200, 202 and 204, respectively, are capable of being selectively connected across the terminals of the control magnet I90 by means of a distributor switch 206.

Obviously, depending upon the particular condenser which may be thrown into parallel with the magnet I90 in the local circuit including the battery I92, the extent of delayed action imparted to the magnet I90 will be varied.

The operation of the apparatus In the operation of the apparatus, whether for fully automatic operation thereof or for step-bystep verification of single characters, it is necessary first to close the switch S2, thus supplying power to the light source I20, energizing the amplifier 6'], setting the motor M into operation, and sending a pulse of current from the source S through the lines 1;, u, t, s, the pair of contacts 38, and line 1, to the common contact bar I4 of the sensing mechanism II. Depending upon the particular coded character which is in registry with the various brushes I2 at'the index point position, one or more circuits is or are completed through one-or more of the various lines m, n, o and p to the corresponding permutation magnets 40, 42, 44 and 46. Energization of any one of the permutation magnets 40, 42, 44 and 46 serves to attract its respective armature 48 thereof and mechanically closeits respective pair of locking contacts 50 for subsequent electrical effect, as will appear presently.

Upon subsequent closing of the normally open switch S1 against the action of a bias spring I96,

a circuit is established from the source S throughthe line 0, switch S1, line i, the pair of contacts 30, line 10, clutch magnet 32 and lines 1 and h. Energization of the clutch magnet 32 causes the pin I66 to be withdrawn from the path of movement of the fingers I64 on the clutch face plate I54, thus allowing this latter element to commence its rotation. Rotation of this member I54 imparts rotary movement to the cam disc I59 upon which the projections I6I are mounted while at the same time motion of thefilm I0 is commenced by virtue of the driving connection be-.'

. short interval of time prior to opening of the pair of contacts 38.

As previously mentioned,, energization of the magnet I serves to close the pair of contacts 54 which, upon closing, due to the fact that the proper contacts 50 have been mechanically closed by their respective magnets 40, 42, 44 and 46, will serve to close a holding circuit through the permutation magnets leading from the source S, lines 1:, u, t, y, the pair of contacts 54, common line at, contacts 50, such permutation magnets as have been selected by the sensing mechanism II, and lines 10, i;g and h. Closing'of this latter circuit will serve to hold the permutation bars 58, 58, 68 and 82 in one of the positions of registry of the apertures 54 according to the particular coded character being sensed in the sensing unit II. Closing of the pair of contacts 28 by the magnet I88 serves to close a circuit from the source S through lines h, j, j, the pairs of contacts 28, line e, the-tape steppingmagnet 22, line b, the pair of contacts 28, lines a, d and 0. Upon energization of the stepping magnet 22 the ratchet mechanism 28 assumes its preset position against the action of the coil spring -24, as previously described.

Immediately upon energization of the stepping magnet 22, the normally closed pairs of contacts 28 and 88 become open. Opening of the pair of contacts 28 serves to place the resistance R1 in series with the magnet 22 thus preventing this magnet from becoming overheated.

upon deenergization thereof, permits the spring 24 to exert a. pulling eii'ect upon the ratchet mechanism 28 and effect stepping of the tape T in the sensing device I I from one index point position to the next preparatory to the next succeeding sensing operation. Opening of the pair of contacts 54 serves to open the local-circuit previously described through such holding contacts 58 at the permutation magnets 48, 42, 44 and 48 as may be closed, thus releasing the locking eflect on these magnets for further shifting operation of the permutation bars during the next succeeding cycle of operation, 1. e., sensing of the next char- Simultaneously with the initial movement of the cam disc I58, movement of the film 18 commences. The permutation bars 56, 58, 68 and 82, being in their proper position of registry for passage of light through the various apertures 84 thereof which happen to be in alignment according to the character being sensed and the selected code, light will pass through the slots I88 and H4, and the selected sound track on the film l8, and enter the light sensitive cell 85, thus energizing the same. Thus, sound will issue from the reproducing device I88 or I82 according to the selected character.

Upon opening of the pair of contacts", which operation, as' previously explained, is adeiayed ,operation occurring after closing 'of the contacts '28 and 54, the previously described circuit leading to the common contact bar I4 of the sensing mechanism II becomes opened, thus opening whatever circuits may exist through the lines m,

11., o and p. The selected permutation magnets 48, 42, 44 and 45, however, will remain energized due to the action of the locking contacts 58 operating through the pair of contacts 54, as previously explained.

During movement of the follower I53 from the initial projection I5I, upon which it formerly rested, to the next succeeding projection on the cam disc I58, ample time is provided for issuance of a complete sound cycle representative of a decoded character from the reproducing device I88 or I82 according to the selected character. Because of the fact that upon energization of the tape-advancing magnet 22 the pair of contacts 88 immediately become opened, the circuit existing acter. Closing of the pair of contacts 88 again more circuits to be closed through the lines m, n,

o and p and reset the permutation bars 58, 58, 88

and 52 upon commencement of the'next cycle 0 operation. 1

After the contacts 88 have been closed and the permutation bars moved to their reset position, the arrangement of the various parts, both electrically and mechanically, is the same as that set forth at the beginning of the description of the operation of the apparatus. The operation of the apparatus is continuous until such time as the operator releases the switch S1 and opens the local circuit extending through. the clutch magnet 82. The motor M, however, will continue to run until such time as the switch S2 is open.

The speed of operation of the apparatus may be controlled by selecting any one of the various condensers 288, 282 or 284 for connection in parallel across the terminals of the control magnet I88 by meansof the distributor switch.286. The various condensers, when thus connected across the terminals of the magnet I88, serve to store electrons during such time as the pair of contacts I88 in the local circuit, including the battery I82, is closed. Upon opening of the pair of contacts I88 complete deenergization of the magnet I88 occurs only after the particular condenser 288, 282 or 284, as the case may be, which is through the clutch magnet 82 is opened and this .magnet becomes deenergized, thus allowing the stop pin I65 to be projected into the path of movement-of the various fingers I54 on the face plate I54 of the clutch assembly I55. The fingers I84 are so positioned about the periphery of the face-plate I54that when the disc I58 is caused to} terminate its rotation, one of the projections I8I will ride beneath the follower I58 and cause the pair of contacts I88 to become open and thevarious parts of the clutch mechanism I and-cam connected across its terminals, has become discharged. Thus, the amount of delay action afforded by these various condensers may be varied and as a consequence the pair of contacts 88 have their moment of openingeither advanced or retarded to control the interval of time between successive tape advancing operations.

The invention is not to be limited to the exact arrangement of parts shown in the accompanying'drawlngs or described in this specification as various changes in the details of construction may be resorted to without departing from the spirit of the invention. For example, while the invention has been fllustrated in connection with the sensing of perforations in a record media, it is obvious that the principles of the invention may be applied to the sensing of characters on a record media regardless of how. they are applied to the media. For example, the apparatus, with but slight modification, is adapted for use in the sensing of the so-called carbonspot type of character on a record media. Only insofar as the invention has been particularly pointed out in the accomp ny ng claims is the same to be limited.

What is claimed-is: l..In a verifying apparatus, a

devices adaptedto' sense perforations in the index positions of a record media, including circuits adapted to be completed under control of sa d sensing means upon sensing of one or more perforations in a column, a source of light producing a light beam, means for intercepting said beam and I splitting the same into individual beams in accordance with the closing of said circuits, and photoelectrically controlled means responsive to the creation of said individual beams for producing respective audible signals.

2. In a verifying apparatus, analyzing devices adapted to sense perforations in the index positions of a record media, a series of permutation magnets, one for each index point position of' the record media columns, a circuit for each magnet adapted to be completed under control of said sensing means upon sensing one or more perforations in a column, a permutation bar for each 'magnet having a series of holes therein and movable upon energization of the magnet from an initial position to a final position, said holes being positioned in their respective bars at locations wherein certain of the same move into registry when one or more of the bars are in their final positions, a source of light, means for directin light issuing from said source onto said permutation bars for passage through such apertures as move into alignment, and photoelectrically controlled means responsive to the passage o light through said apertures for selectively producing sound signals in accordance with thepassage of light through said apertures. 3. In a verifying apparatus, analyzing device adapted .to sense perforations in the index positions of a record media, a series. of permutation magnets, one for each index point position of the record media columns, a circuit for each magnet adapted to be completed under control of said sensing means upon sensing one or more perfora tions in a column, a permutation bar for each magnet having a series of holes therein and movable upon energization of the magnet from an initial position to a final position, said holes being positioned in their respective permutation bars at locations wherein certain of the same move into registry when one or more of the bars are in their final positions, a source of light p0- sitioned on one side of said permutation bars, a sound film having a sound track thereon in registry with said perforations on the other side of said permutation bars, means for moving said film, a light sensitive device positioned adjacent the film for receiving light issuing from said source and passing through said perforations and film, and means operatively connected to the lightsensitive device for amplifying the effect of light impulses issuing from said film and for converting the same into sound.

WARD LEATHERS..

JERRIER HADDAD.

WILLIAM J. A. BAILEY. 

